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  • Reading line by line from a file in C

    - by mh234
    What I am trying to do is print out the contents of a file line by line. I run the program in terminal by doing: ./test testText.txt. When I do this, random characters are printed out but not what is in the file. The text file is located in the same folder as the makefile. What's wrong? #include <stdio.h> FILE *fp; int main(int argc, char *argv[]) { char line[15]; fp = fopen(*argv, "r"); while((fgets(line, 15, fp)) != NULL) { printf(line); printf("\n"); } }

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  • Python 2.7 creating a multidimensional list

    - by poop
    I don't know why I am having so much trouble creating a 3 dimensional list. I need the program to create an empty n by n list. So for n = 4: x = [[[],[],[],[]],[[],[],[],[]],[[],[],[],[]],[[],[],[],[]]] I've tried using: y = [n*[n*[]]] y = [[[]]* n for i in range(n)] Which both appear to be creating copies of a reference. I've also tried naieve application of the list builder with little success: y = [[[]* n for i in range(n)]* n for i in range(n)] y = [[[]* n for i in range(1)]* n for i in range(n)] I've also tried building up the array iteratively using loops, with no success. In my rapid flurry of attempts to not post something stupidly easy to SO, I came upon a solution: y = [] for i in range(0,n): y.append([[]*n for i in range(n)]) Is there an easier/ more intuitive way of doing this?

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  • Problem with SDL 1.2 when setting videomode with SDL_SetVideoMode

    - by user574911
    I have a very simple program, in which I am initialising with SDL_Init(flags) and using SDL_SetVideoMode but It fails by returning null. I think I am missing some config parameters/options, if any one knows about this erro please let me know. My code is as below : if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) { fprintf(stderr, "Could not initialize SDL\n"); exit(1); } screen = SDL_SetVideoMode(640, 480, 0, 0); if(!screen) { fprintf(stderr, "SDL: could not set video mode - exiting\n"); exit(1); }

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  • Will the template argument's destructor to a templated class be called on deletion?

    - by Mutmansky
    If you have a templated base class as in the following example: class A{ A(); virtual ~A(); }; template <class T> class B : public T { B(); virtual ~B(); }; typedef B<A> C; class D : public C { D(); virtual ~D(); }; When you delete an instance of D, will the destructor of A be called? I'll probably create a test program to find out what happens, but just thinking about it, I wasn't sure what should happen.

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  • BufferedInputStream.read(byte[]) Causes problems. Anyone have this problem before?

    - by K-RAN
    Hello! I've written a Java program that downloads audio files for me and I'm using BufferedInputStream. The read() function works fine but is really slow so I've tried using the overloaded version using byte[]. For some reason, the audio becomes lossy and strange after download. I'm not totally sure what I'm doing wrong so any help is appreciated! Here's the simplified, sloppy version of the code. BufferedInputStream bin = new BufferedInputStream((new URL(url)).openConnection().getInputStream()); File file = new File(fileName); FileOutputStream fop = new FileOutputStream(file); int rd = bin.read(); while(rd != -1) { fop.write(rd); rd = bin.read(); }

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  • Obtaining frame pointer in C

    - by assketchum
    I'm trying to get the FP in my C program, I tried two different ways, but they both differ from what I get when I run GDB. The first way I tried, I made a protocol function in C for the Assembly function: int* getEbp(); and my code looks like this: int* ebp = getEbp(); printf("ebp: %08x\n", ebp); // value i get here is 0xbfe2db58 while( esp <= ebp ) esp -= 4; printf( "ebp: %08x, esp" ); //value i get here is 0xbfe2daec My assembly code getEbp: movl %ebp, %eax ret I tried making the prototype function to just return an int, but that also doesn't match up with my GDB output. We are using x86 assembly. EDIT: typos, and my getEsp function looks exactly like the other one: getEsp: movl %esp, %eax ret

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  • C# design question (Connections)

    - by David
    Hello, I would like to hear your suggestions on kind of design problem which I have in c#. So, I am making a program where people can meet and draw in the same window over the internet or LAN. I am drawing into a bitmap and than I set it to a pictureBox component. I have a hard time to decide how to send updates to each user, what is the best way to do it. Should I send coordinates of mouse and than do the drawing on each users screen or stream the image to each. Maybe you know better solution to keep it synchronized and efficient. Thank you.

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  • Putting a variable inside a string (python)

    - by Gish
    Hi I am quite new to python and this is probably quite a basic question but the help would be much appreciated. I would like to put an int within a string. This is what I am doing at the moment.. end = smooth(data,window_len=40) plot.plot(time[0:len(end)],end) plot.savefig('hanning(40).pdf') #problem line I have to run the program for several different numbers instead of the two 40's. So I'd like to do a loop but inserting the variable like this doesn't work: plot.savefig('hanning',num,'.pdf') Thanks!

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  • wrap all lines that are longer than line length

    - by user1919840
    I am writing a program that limits each line to a certain length. this is what i got so far, i am almost done but i still need to cut each line, but i cant figure it out. def main(): filename = input("Please enter the name of the file to be used: ") openFile = open(filename, 'r+') file = openFile.read() lLength = int(input("enter a number between 10 & 20: ")) while (lLength < 10) or (lLength > 20) : print("Invalid input, please try again...") lLength = int(input("enter a number between 10 & 20: ")) wr = textwrap.TextWrapper() wraped = wr.wrap(file) print("Here is your output formated to a max of", lLength, "characters per line: ") wr.width = lLength wr.expand_tabs = True for lines in wraped: print(lines) an example of what the output SHOULD be is this. If the file specified contains this text: hgytuinghdt #here the length is 11 ughtnjuiknshfyth #here the length is 16 nmjhkaiolgytuhngjuin #here the length is 20 and the lLength is specified to 15 then this should print out: hgytuinghdt ughtnjuiknshfyt h nmjhkaiolgytuhng juin Thanks.

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  • How to make shell output redirect (>) write while script is still running?

    - by Noio
    I wrote a short script that never terminates. This script continuously generates output that I have to check on every now and then. I'm running it on a lab computer through SSH, and redirecting the output to a file in my public_html folder on that machine. python script.py > ~/public_html/results.txt However, the results don't show up immediately when I refresh the address. The results show up when I terminate the program, but as I said, it doesn't halt by itself. Is that redirect (>) being lazy with with writing? Is there a way to continuously (or with an interval) update the results in the file? Or is it the webserver that doesn't update the file while it is still being written?

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  • C: Comparing two long integers (very strange)

    - by Kyle
    Hi, I have following situation (unix) : x is a long and has value 300 y is a long and has value 50000 if (x <= y) printf("Correct."); if (x > y) printf("Ouch."); Now I always get "Ouch". That means the program keeps telling me that 300 is greater than 50000! It only works again when I do if ((int)x <=(int) y) printf("Correct."); if ((int)x > (int)y) printf("Ouch."); So what is wrong with the comparison operators?

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  • Compare to a defined constants in C?

    - by J.W.
    I am trying to compare to a defined constants in C, and I have simplified my program to the following.. #include "stdio.h" #include "stdlib.h" #define INVALID_VALUE -999; int main(int argc, const char* argv[]) { int test=0; if(test==INVALID_VALUE) //The error line.. return INVALID_VALUE; return 0; }; And when I use gcc to compile. it gives out error "error: expected ‘)’ before ‘;’ token" Any reason that this cannot be done.

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  • Load a dll library on Java

    - by crimson_king
    I need to load a library written in C on java. I have only dlls and header files. Since I didn't understand how to translate pointers or other derivated types from JNI documentation I tried to use an automating tool for this, gluegen and SWIG, but I couldn't manage on how to use them. I tried to create an interface file for SWIG but it only gives errors. Is there an example on how to load a dll to a java program using ANY tool that works and can generate translated C function and types from .h files ?

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  • about event handle-function in JavaScript

    - by T_t
    hi! In my program,i write like this: function handleFuc( event ){ var a = event.pageX; var b = event.pageY; var tempdiv = document.createElement("div"); tempdiv.onmouseout = function(){ var x = event.pageX; // 1 var y = event.pageY; // } } var div = document.getElementById( "id" ); div.onmouseover = function(){ handleFuc( event ); } now,in function handleFuc, how could i distinguish the two "event"? Thanks! :)

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  • Make network changes permanent - C++

    - by pparescasellas
    I need to allow an external client to change the IP of the Linux machine where the program is running (C++). I already know how to list all the local interfaces and the current IPs assigned to them. I also know how to programatically change said IPs. What I need to know is how to make this change permanent so, if the machine reboots, it keeps the same network configuration. What's the best way to do this? Manually parsing /etc/network/interfaces? Calling some linux command? Edit: I'm using Debian. Thanks!

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  • Visual Studio C++ adds "junk" to my programs

    - by sub
    I have looked into the binaries produced by MSVC 2010 from my source code, and saw everything being filled with "junk". I don't know how to explain, but my executables are being added too much unnecessary information, like: Lots of Microsoft default error messages, I don't want them XML schema settings (Why!?) Other things not important for the execution of the main program How can I stop MSVC doing this? Do I have to switch to GCC? In all other programs (written in C++ too, from Word processors to games), this junk simply doesn't exist.

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  • programming help

    - by user208639
    class Person holds personal data Its constructor receives 3 parameters, two Strings representing first and last names and an int representing age public Person(String firstName, String lastName, int age) { its method getName has no parameters and returns a String with format "Lastname, Firstname" its method getAge takes no parameters and returns an int representing the current age its method birthday increases age value by 1 and returns the new age value Create the class Person and paste the whole class into the textbox below public class Person { public Person(String first, String last, int age) { getName = "Lastname, Firstname"; System.out.print(last + first); getAge = age + 1; return getAge; System.out.print(getAge); birthday = age + 1; newAge = birthday; return newAge; } } im getting errors such as "cannot find symbol - variable getName" but when i declare a variable it still not working, i also wanted to ask if i am heading in the right direction or is it all totally wrong? im using a program called BlueJ to work on.

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  • Can set_intersection be used with hash_set in C++?

    - by R S
    I am calculating intersection, union and differences of sets. I have a typedef of my set type: typedef set<node_type> node_set; When it is replaced with typedef hash_set<node_type> node_set; The results are different. It's a complicated program, and before I start debugging - am I doing it right? When I use functions like this: set_intersection(v_higher.begin(), v_higher.end(), neighbors[w].begin(), neighbors[w].end(), insert_iterator<node_set>(tmp1, tmp1.begin())); should they work seamlessly with both set and hash_set?

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  • Get records in particular date range

    - by developer
    Hi All, I have a column in database that shows DateCreated. Now I want to filter records depending on the date range selected. Eg, Created within 60 days, created withing year, etc. I have a variable dateCreated that shows me what the user has selected as the range.i.e., whether it is Created within 60 days, created withing year. if (datecreated == "Created within 60 days") { DateTime CurrTime = DateTime.Now; if (prg.Subscriber.Username == CurrentUsername && prg.Program.DateCreated<=DateTime.Now - 60) { UserPrgList.Add(new ProgramSubscriptionViewModel(prg)); } } But the above code wont work..what would be the syntax to get the records within a particular range??

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  • Ant command line arguments

    - by js7354
    Program works fine when run with eclipse run configurations, but when run with ant, it is unable to parse int from args[0], which I do not understand. Full code is available here https://gist.github.com/4108950/e984a581d5e9de889eaf0c8faf0e57752e825a97 I believe it has something to do with ant, target name="run" description="run the project"> java dir="${build.dir}" classname="BinarySearchTree" fork="yes"> <arg value="6 in.txt"/> /java> /target> the arg value will be changed via the -D flag, as in ant -Dargs="6 testData1.txt" run. Any help would be much appreciated, it is very frustrating.

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  • Setting language/culture for reporting services report rendered through C#

    - by Chris Latta
    I have written a report renderer in C# that runs and attaches reports to an email. This is all working great, except the date format of the parameters are incorrect when listed in the report title. All the reports have their language set to =User!Language and the parameters are output using the FormatDateTime function to format according to the user's regional settings. I am basically using the rendering method described here on MSDN. This all works great when the reports are run through the browser. However, when I render the report from C# it uses en-US date format. The report server's regional settings are set appropriately to the correct region as are the regional settings of the computer the C# progam is running on.. What property do I need to set in my C# program for the report to be rendered using my appropriate language/culture?

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  • how to form an array of numbers , taken input from a file in C

    - by mekasperasky
    The program should be able to make an array of numbers from a text file which reads like this The data is given as this 123 2132 1100909 3213 89890 my code for it is char a; char d[100]; char array[100]; a=fgetc(fp) // where fp is a file pointer if (a=='') { d[count1]='/0'; strcpy(&array[count],d); count=count+1; memset(d,'\0',100) count1=0; } else { d[count1]=a; count1=count1+1; } a=fgetc(fp);

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  • How can I determine if a specified string is in a specific MySQL column? (and also perhaps a tutoria

    - by Rob
    This is a fairly simple question. Basically, I'm having a program send HardWare ID's to my PHP script as GET data. I need the PHP script check to make sure that HardWare ID is in a specific MySQL column, and if it is, { continue the script, } else { exit(); } Problem is I'm not too good with MySQL and have no idea how to do this. However, I feel that I should know this by now, so if someone could also link me to a good tutorial site for MySQL, that kind of keeps it "humanized" if you know what I mean. One that "dumbs it down." I'm not dumb or anything, I just get sidetracked easily, and if all its doing is showing me code and not explaining it, I won't pick it up. If you don't have any tutorial sites off the top of your head, I'll settle for help with the first question, and try to hunt down a tutorial later.

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  • Windows 7 application issue - only appears in taskbar

    - by tylercomp
    I have an issue where a program that runs fine under windows xp has stopped working with windows 7. The application appears to start fine then disappears with only the taskbar icon remaining. If you hover over the taskbar icon you can see the application and it kind of looks correct but selecting it does nothing. I cannot seem to get the application to actually appear. Has anyone experienced anything like this and is aware of any possible solutions? Recent builds have worked with windows 7 in the past and I don't believe any significant changes were made before this issue arrived. Thanks

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  • Using AttachConsole, user must hit enter to get regular command line.

    - by Clangon
    I have a progaram that can be ran both as a winform, or from command line. If it is invoked from a command line I call AttachConsole(-1) to attach to parent console. However, after my program ends, the user must hit enter to get back the standard command prompt ("c:\"). is there a way to avoid that need? Thanks. I could wrap it in a cmd file to avoid that issue, but I would like to do it from my exe.

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